I agree with this to a point, but you can't even pretend to have an informed opinion, if all your news comes from one of the heavily slanted/propaganda channels. You have a very one sided view that has a good chance of not even being true. If you don't check out other sources, you don't know, if it's accurate or not. Trusting one heavily slanted source shows you're not really interested in the truth. You're interested in propaganda that fits your agenda. (FWIW, all my references to "you" is a general you. It's not meant to accuse you specifically. I have no idea where you get your news.)
Case in point, when FIL passed away two years ago, I got an up close & personal experience with people who obviously were incapable of thinking for themselves. There was a continuous flow of people visiting us at MIL's house. I sat there for hours hearing the exact same conversation. I'm not even kidding. The large majority of people who came had the same few talking points that they kept bringing up. It got to the point, that I was struggling not to laugh. How many times can you hear the exact same discussion, without finding it humorous? It was like I was experiencing groundhog day over & over.
It was obvious they were all watching the same news channel. If your conversation topics exist solely from what you have heard from one of the "propaganda" channels in the past few days, you can't even pretend to have an informed & open mind. If you've gotten to the point that every discussion brings you back to pushing the agenda of your preferred news source, you really need to seek out other news sources, so you don't sound so clueless & lack all credibility.